--- service: i.root-servers.net start-period: '2015-07-22T00:00:00Z' end-period: '2015-07-23T00:00:01Z' metric: traffic-volume dns-udp-queries-received-ipv4: 5168350227 dns-udp-queries-received-ipv6: 240008677 dns-tcp-queries-received-ipv4: 12666910 dns-tcp-queries-received-ipv6: 278319 dns-udp-responses-sent-ipv4: 5120677169 dns-udp-responses-sent-ipv6: 244312879 dns-tcp-responses-sent-ipv4: 12626218 dns-tcp-responses-sent-ipv6: 280933